1 files changed, 70 insertions, 0 deletions
diff --git a/tests/bugs/readdir-ahead/bug-1390050.c b/tests/bugs/readdir-ahead/bug-1390050.c
new file mode 100644
index 00000000000..5593a1d4c0c
--- /dev/null
+++ b/tests/bugs/readdir-ahead/bug-1390050.c
@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <string.h>
+#include <errno.h>
+
+int
+main (int argc, char *argv[])
+{
+        const char  *glfs_dir          = NULL, *filepath = NULL;
+        DIR         *dirfd             = NULL;
+        int          filefd            = 0, ret = 0;
+        struct stat  stbuf             = {0, };
+        size_t       size_before_write = 0;
+
+        glfs_dir = argv[1];
+        filepath = argv[2];
+        dirfd = opendir (glfs_dir);
+        if (dirfd == NULL) {
+                fprintf (stderr, "opening directory failed (%s)\n",
+                         strerror (errno));
+                goto err;
+        }
+
+        filefd = open (filepath, O_RDWR);
+        if (filefd < 0) {
+                fprintf (stderr, "open failed on path %s (%s)\n", filepath,
+                         strerror (errno));
+                goto err;
+        }
+
+        ret = stat (filepath, &stbuf);
+        if (ret < 0) {
+                fprintf (stderr, "stat failed on path %s (%s)\n", filepath,
+                         strerror (errno));
+                goto err;
+        }
+
+        size_before_write = stbuf.st_size;
+
+        ret = write (filefd, "testdata", strlen ("testdata123") + 1);
+        if (ret <= 0) {
+                fprintf (stderr, "write failed (%s)\n", strerror (errno));
+                goto err;
+        }
+
+        while (readdir (dirfd)) {
+                /* do nothing */
+        }
+
+        ret = stat (filepath, &stbuf);
+        if (ret < 0) {
+                fprintf (stderr, "stat failed on path %s (%s)\n",
+                         strerror (errno));
+                goto err;
+        }
+
+        if (stbuf.st_size == size_before_write) {
+                fprintf (stderr, "file size (%lu) has not changed even after "
+                         "its written to\n", stbuf.st_size);
+                goto err;
+        }
+
+        return 0;
+err:
+        return -1;
+}